RE: [Honda-C70] Top Speed

The shift marks you mention for 1st & 2nd gears are the Maximum recommended speed ,not a shift point. 1 time you say the front sprocket is 14 t [stock ] the next you say 15 T [geared high ]. My 81 will get to 35 in about 1/8 mile ,40 in 1/2 mile . 45 to 50 takes the mile &1/4 long big hill west of town & a 20 mph tail wind . The speed up that hill is 18 to20 in 2nd gear 3rd is useless . As a last resort have you considered finding a small test pilot & a looong test road ? You seem to have done everything right so maybe the bike is doing all it can & your expectations are a bit too high . Good Luck ! Baby Huey

To: Honda-C70@yahoogroups.com
From: cayman2653@yahoo.com
Date: Tue, 9 Aug 2011 12:47:09 +0000
Subject: [Honda-C70] Top Speed

Fellows, I need some more ideas. Per my previous posts the entire upper end of the engine has been replaced including the carb and a new clutch. The bike would do 35mph before all the changes were done and still will only do 35mph. The valves, points, cam timing and ignition timing are all per Honda spec's. The dratv carb is set with the needle one notch from the bottom and the main jet is from the original Honda carb; I could not find a number on the after market main jet so I assumed the Honda jet would be correct. The rear tire is inflated to 40psi and the front to 35psi. The chain is adjusted correctly and both wheels spin freely. Throttle cable adjusted with about 5mm free play. Front sproket is 15 tooth and the rear is 36 tooth. The bike idles smooth and steady with no bogging in mid range or upon accelleration. It will reach the shift marks in 1st and 2nd gear buut will only go to 35mph in 3rd gear. It goes to 35mph in about 1/8 mile. What could be hard?

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C70 Passport Not Running Right?
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1980-83 C70 Honda Service Manual: http://tinyurl.com/hu42c
1980-81 C70 Troubleshooting Guide:
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1982-83 C70 Troubleshooting Guide:
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1982-83 C70 Maintenance Schedule: http://tinyurl.com/hw35c

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